Year | Value | 2022 | 25,207 | 2021 | 25,599 | 2020 | 25,922 | 2019 | 26,188 | 2018 | 26,410 | 2017 | 26,494 | 2016 | 26,638 | 2015 | 26,931 | 2014 | 27,148 | 2013 | 27,351 | 2012 | 27,592 | 2011 | 27,665 | 2010 | 27,613 | 2009 | 27,702 | 2008 | 27,885 | 2007 | 28,099 | 2006 | 28,462 | 2005 | 29,048 | 2004 | 29,808 | 2003 | 30,631 | 2002 | 31,431 | 2001 | 32,154 | 2000 | 32,785 | 1999 | 33,194 | 1998 | 33,433 | 1997 | 33,644 | 1996 | 33,776 | 1995 | 33,831 | 1994 | 33,785 | 1993 | 33,626 | 1992 | 33,389 | 1991 | 33,099 | 1990 | 32,760 | 1989 | 32,462 | 1988 | 32,225 | 1987 | 31,971 | 1986 | 31,714 | 1985 | 31,423 | 1984 | 31,037 | 1983 | 30,527 | 1982 | 29,885 | 1981 | 29,136 | 1980 | 28,407 | 1979 | 27,957 | 1978 | 27,775 | 1977 | 27,695 | 1976 | 27,634 | 1975 | 27,438 | 1974 | 27,045 | 1973 | 26,572 | 1972 | 26,125 | 1971 | 25,661 | 1970 | 25,088 | 1969 | 24,454 | 1968 | 23,865 | 1967 | 23,332 | 1966 | 22,831 | 1965 | 22,352 | 1964 | 22,124 | 1963 | 22,070 | 1962 | 21,870 | 1961 | 21,537 | 1960 | 21,135 |
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